RICE HUSK SILICA AS PARTIAL REPLACEMENT OF CEMENT ON A SELFCOMPACTING CONCRETE

Abstract

This study evaluates a partial replacement of Portland Cement with Silica from Rice Husk. The cement replacement was carried out in a self-compacting concrete composition, which was used by a concrete batching plant in the city of Alegrete – RS. For this work, tests were carried out on the concrete in the fresh and hardened states. The results showed that it is possible to partially replace cement Portland with Rice Husk Silica (up to 30%) without impairing the mechanical behavior of the self-compacting concretes. The best concrete mixture, taking into account all aspects studied, was the one containing 20% of replacement. However, the mix with 30% replacement can be used in cases with lower reinforcement density because, in economic and sustainability terms, the higher the proportion used, the greater the benefit.